54 HTMENOPTERA OF AMERICA. [PART I. 



carina on the middle part of the metathorax. Differs from Ghi- 



•all by its prothorax not crested on the sides, its petiole 



narrower, etc. It comes very near to Bomandinus, but the thorax 



lorter anteriorly, more narrowed posteriorly; the petiole 



narrower, less inflated, etc. 



Mexico. The Oriental Cordillera (Mr. Sumichrast). 



49. Z. niiscogaster Sadss. — 9- Minutns, niger, dense punctatus, 

 cinereo hirtus; clypeo integro, rugoso, piloso ; fronte inter antennas 

 transversim carinato; ocellia in summo fronte sitis. Thorax antice 

 cristatus, cariuatus, hunieris liaud spinosis; postscutello et metauoto 

 baud rugosis, velutinis, hoc tenuiter striato, nee carinato, nee distinete 

 foveolato, sed sulco profundo diviso. Abdomen politum, sericeum ; 

 pel iolo elongato, paiuru intiato, supra parum gibboso ; seenndo segmento 

 longe pedunculate, ovato-dilalato subdepresso. Caput immaculatum ; 

 pronoti margo, macula subalaris, maculae scutelli et 2 metauoti, lineola 

 utrinque, petioli apex, limbus secundi segment!, lineolaque utrinque in 

 basi pedunculi, flava. Alse subpellucidse, venis fuscis. — Longit. (1.015. 



'A. discombodit similis at minor, et pronoto baud anguloso differt. A Z. 

 'lino differt statura graciliore, petiolo minus punctato et minus tume- 



: 



Zethus miscogaster Sauss. Vespides, I. 18, 18, £>, 1852. 



Zethus microguster (per errorem) Sauss. Revue Zool. X, 1858, 163. 



Il'ib. South America. (Typus in auctoris museo.) 



50. Z. l»iiiodJs Fabr. — Gracilis, niger, dense punctatus. Caput latum, 



■ cribratum ; clypeo rugose cribrato, integro. Thorax cribratus, 

 cristato-marginatus, clypeo convexo, nitido, cribrato; postscutello hand 

 cribrato, postice truncato, sed cantho acuto nullo; metauoto in medio • 



olato, carinis prominentibus duabus e postscutelli angulis emergen- 

 tibus ; spatio extra carinam sito utrinque valde striato-plicato ; usque ad 

 canthum lateralem acutum. Abdominis petiolo polito, tenuiter punc- 

 tato, sat ovato-tumefacto, apice utrinque flavo-notato; secundo segmento 

 globoso, longe pedunculato, ubique tenuiter punctato, sericeo setoso, in 

 medio margine impresso ; tertio, in medio margine paulum producto ; 

 tenuissime flavo-marginatis ; reliquis piceis vel ferrugineis. 



B I, 2, ferrugineas. Alse subhyalinsB. Longit, 0.017. 



Ve*pa binodis Fabr. Knt. Syst. Suppl. 1798, 2(M.-Coqueb. Illust. Icon. 



Ins. pi. xv. fig. 2. 

 Eutnenes binodis \ vbr. S, P. 287. 

 Zethus binodis Sadss. Vespides, I, 20, 23.' 



1 Typus in museo Parisieusi. 



